PESI | 33,406 followers on LinkedIn. Nonprofit organization dedicated to serving the educational needs of professionals for over 40 years. | Since 1979, PESI, a nonprofit organization, has proudly served as the leading provider of continuing education products and services for the behavioral health, healthcare, and rehabilitation industries. Working alongside the world’s leading experts, we create cutting-edge seminars, conferences, online courses, DVDs, CDs, and books that meet the needs of professionals. For over 40 years we have partnered with many of the nation’s leading conferences, publishers, associations, and institutes—each dedicated to providing professionals with the highest quality content, products, and events.